204 FORESTS, WOODS, AND TREES 
the same valley there is a compensation reservoir at Under- 
bank at 600 feet elevation and draining 5000 acres, 
The gathering grounds, 23,906 acres in all, are not 
owned by the Corporation, and consist for the most part of 
moorland, with a very small population. No large scheme 
for afforestation has been proposed. Owing to non-owner- 
ship, the question has not been taken up by the Corporation, 
who have planted small areas immediately adjacent to the 
reservoirs on suitable soil with Scots pine, larch, and birch. 
The engineer, Mr. L. 8. M. Marsh, doubts whether advan- 
tage would be derived by planting exposed moorland. See 
notes on the Sheffield water supply in Proc. Inst. Civil 
Engineers, vol. 181, pp. 1-14 (1910). 
The Sheffield Corporation decided in 1913 to proceed 
with the construction of two new reservoirs, Broomhead and 
More Hall reservoirs, with a catchment area of 6496 acres 
in the Ewden Valley, which is a short arm of the Little Don 
Valley. The gathering ground includes the well-known 
Broomhead moor, and the valley itself is one of the most 
beautiful in Yorkshire. The new project is described, with 
sketch map of the four catchment areas and views of Ewden 
Valley, in The Engineer, 14th Nov. 1913, pp. 510 and 520. 
Sheffield obtains an independent water supply from the 
Derwent Valley Water Board. 
Doncaster obtains its water supply in part from an im- 
pounding reservoir at Thrybergh, with 2517 acres of gather- 
ing ground on the hills south-west of Conisborough, all 
pasture and arable land at the low elevation of 180 to 450 
feet. Most of the area does not belong to the Corporation, 
who merely exercise sanitary control over it. I am in- 
formed officially, that “As the character of the land was 
entirely rural at the time the impounding reservoir was 
constructed, no farms or houses were removed; and there 
are certainly not more than 40 habitations on the whole of 
the area at the present moment. It has only been found 
necessary to exercise supervision over the manuring of the 
arable land, and the removal of carcases from the neigh- 
